Last-time-buy notices, traced to every assembly and order they put at risk.

A maker announces that a part is going away, or that its die, package or plant is changing. The notice names the maker's own part numbers and a few dates, and says nothing about your customers. Before the last order date passes, someone has to find every assembly that uses the part, the orders still to ship, the stock and open POs, and every OEM who needs to hear.

In the proof of concept, AI reads copies of notices your team already handled and drafts the impact list and the OEM notes your team would have written: each assembly and revision, the demand still open, the dates from the notice and any replacement it names, with the record behind every line. Your reviewer sets it beside what your buyers and program managers actually did.

Two kinds of notice run on different clocks. A discontinuance notice ends a part. JEDEC's JESD48, Product Discontinuance, set the floor in its December 2011 revision: at least six months from the notice to place final orders and 12 months from the notice for final shipments. JEDEC has since replaced it with J-STD-048, the notification standard for product discontinuance, and notices still cite either one. A change notice keeps the part but alters it. Under J-STD-046, the customer notification standard for product and process changes, a change that affects form, fit, function, quality or reliability counts as major, and one maker's procedure built on it sends notice at least 90 days before the changed part ships, 180 for automotive parts. A change notice may also give the last date the unchanged part will be made, which matters to any OEM that hasn't approved the change.

The notice speaks in the maker's part numbers. JESD48 requires only two things in a discontinuance notice: the date for placing last purchase orders and the affected supplier part numbers. Your part numbers are optional. It counts as a customer only someone who bought from the supplier in the past two years or has an agreement or request covering such notices, and it has authorized distributors pass the notice on. So a part bought through a distributor reaches you from that distributor, a part bought from a broker may never reach you at all, and the notice for a part an OEM consigns goes to that OEM, which bought it. The draft matches every number the notice lists through your approved vendor list to your own part numbers, and lists consigned lines apart for the OEM.

Exposure is more than a where-used list. For each assembly the draft shows the revisions that use the part, whether it is the primary choice or an approved alternate, the quantity per board, open customer orders and forecast with their ship dates, stock on hand and open POs. It sets that demand against the last order and last ship dates and marks every assembly whose orders run past them. A replacement named in the notice is recorded as the maker's suggestion and checked against your approved vendor list and the OEM's approved list for that assembly. JESD48 also has the supplier help locate an alternate source, and on request discuss a transfer of technology and tooling.

Makers write their own rules on top of the standards. Texas Instruments publishes a schedule of 12 months for the last order and six more to take final delivery, and warns that a faster withdrawal can happen in rare cases. NXP's Product Longevity program holds listed parts for 10 or 15 years from launch, shows the date each one stays in the program until, and says a part is not discontinued automatically when that period ends; its usual end-of-life and change notice policies still apply. IEC 62402, Obsolescence management, was rewritten in 2019 as a standard with requirements, covering an obsolescence management plan, design choices that reduce obsolescence, and how resolutions are selected and carried out. The draft takes every date from the notice itself, never from a policy page.

Your reviewer. The owner names the person who knows your notice handling best, often a commodity buyer, a component engineer or a program manager. They hold each draft against what your team did: part numbers matched, assemblies and revisions found, demand counted against the dates, replacements checked and notes sent to each OEM. Include one notice that reached you through a distributor, one change notice, and one your team decided did not touch you.

After a yes, every new end-of-life or change notice gets a draft impact list and OEM notes as it arrives, for about 30 days.

Your buyer decides whether and how much to buy and places every order, your engineer judges each replacement, and your program manager edits and sends each note. Nothing moves in your ERP or reaches a customer until a person does it, and scoring runs through the month.